Surveying in a Geothermal Environment: The Lihir Experience
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1 Surveying in a Geothermal Environment: The Lihir Experience Martin Rogers Superintendent Survey & Projects Lihir Gold Limited Papua New Guinea Australasian Mine Surveying Convention th August 2009 Perth WA
2 Outline LGL The Company Lihir The Mine Mining Equipment Geothermal Survey Team
3 LGL The Company Incorporated in PNG in 1995 Leading Gold Producer 2005 Rio Tinto management agreement ended 2007 merge with Ballarat Goldfields NL 2008 merge with Equigold NL Operations in Papua New Guinea, West Africa and Australia Across operations 25 million ounces in reserves 2008 produced 882,000 ounces 2009 forecast 1,040,000 1,200,000 ounces
4 Lihir Island
5 Lihir Island Location Latitude 3 o 07 Sth Longitude 152 o 38 Wst 900km NE Port Moresby Niolam Island Lihir Group New Ireland Province
6 Lihir Gold Mine - History 1982 gold mineralisation identified 1983 Exploration commenced 1995 Special Mining Lease granted & construction commenced 1997 First gold pour 1999 One millionth ounce poured 2000 Owner mining commenced 2009 Participation in mining with landowners Produced more than 6 million ounces
7 Lihir Gold Mine Single ore body (3 linked open pits) Located in an inactive volcanic crater known as the Luise Caldera 2009 ex-pit tonnes 53Mt Process 6Mt of ore Stockpile 4Mt of low grade Gold production 818,000 oz s Minifie Leinetz Kapit Reserves 23.6 M Oz Current Resources stand at 2.63 g/t Au for 36.4 M Oz of gold Mine life beyond 2030
8 Mining Equipment 5 x O&K RH200 Shovels 36 x Cat 785 Trucks & 5 Cat 777 Trucks 4 x D55 Drilltech Drills, 1 x D50 Drilltech Drill, 2 x D45 Drilltech Drills, 1 x Pantera x Barges
9 Geothermal What is it? Geothermal energy is the natural heat of the Earth.
10 Geothermal Powerful Energy Source Geothermal reservoirs can reach temperatures of 700 o F/370 o C (more than 3 x boiling) A geothermal reservoir is a powerful source of energy!
11 Geothermal Hazards Why do I have to know this? Lihir is a geothermally active mine. Everyone working in the mine is exposed to this risk some more than others Unless we take precautions there is a real possibility that we may be injured..so what are the risks?
12 Steam
13 Hot Water POOLS SPRINGS
14 Blow Outs Hydro-thermal Eruptions
15 Gasses H2S
16 Hazard Mitigation Full face respirators placed in Shovel Operator and Blasthole Drill Cabins. Armored glass windows installed on all cabin sides of shovels and drills. Infrared Thermal cameras installed on Shovels to detect high temperatures on mining face
17 Special PPE Heat Guns Cricket H2S Monitor Heat Resistant Boots
18 Procedures
19 PGOA map, Geodomains, Blast hole temps
20 Probehole / blasthole temp monitoring
21 Kapit Depressurisation
22 Steam relief wells (SRWs)
23 Induced hydrothermal eruption
24 Emergency rescue drills Burn Blanket and ERT rescue
25 Geothermal Power
26 The Survey Team Superintendent Martin Rogers Coordinator Richard Nawara Kapit Superintendent Paddy Doyle Senior Austin Sariwa Senior Thomas Kesene Project Engineer (vacant) A Crew C Crew B Crew D Crew 3 rd Yr Graduate Humun Kondi Surveyor Junior Juno Surveyor Andrew Letea Surveyor Tirifoka Gam 2 nd Yr Graduate Eki Piaso Instrument Hand Walter Balbal 3 rd Yr Graduate Susan Baru Assistant John Pelkap Assistant John Apelis Assistant Paul Besi 2 nd Yr Graduate John Wamoi Assistant Otto Kanamel Assistant Joseph Ayeruh Assistant Opnai Ziktunbia
27 Surveying Tools Software MineSight Instruments Geodimeter 510 Total Station Trimble 5700 GPS Trimble S6 Reflectorless / Robotic Total Station Topcon Hyper GA GPS Leica 1100 Reflectorless Total Station HPGPS on Shovels
28 Survey Instruments ATS Geodimeter Prism Monitoring Trimble S6 Robotic Day-to-day work Reflectorless dace pu s Leica TCR 1100 Specialised monitoring Topcon Hyper GPS Vehicle EOM, Bench QA Drill Patterns Control Surveys
29 The Future HPGPS Laser Scanning
30 Work Life - FIFO Work 12 hour days (6am 6pm) 15 days on 13 days off Flights to and from point of hire Accommodation and meals provided whilst on site Play Sports field Tennis courts Basketball courts Gymnasium 25m Swimming pool Squash court
31 Camps & Town
32 Mine & Port
33 Mine
34 End Product
35 Em tasol! Yu gat sampela askim? (Any questions?)
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